136 lines
5.1 KiB
C
136 lines
5.1 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2015 Paul Sokolovsky
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* Copyright (c) 2016 Damien P. George
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* Copyright (c) 2021 Jim Mussared
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <string.h>
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#include <stdint.h>
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#include "py/lexer.h"
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#include "py/frozenmod.h"
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#if MICROPY_MODULE_FROZEN
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// Null-separated frozen file names. All string-type entries are listed first,
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// followed by mpy-type entries. Use mp_frozen_str_sizes to determine how
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// many string entries.
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extern const char mp_frozen_names[];
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#if MICROPY_MODULE_FROZEN_STR
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#ifndef MICROPY_MODULE_FROZEN_LEXER
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#define MICROPY_MODULE_FROZEN_LEXER mp_lexer_new_from_str_len
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#else
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mp_lexer_t *MICROPY_MODULE_FROZEN_LEXER(qstr src_name, const char *str, mp_uint_t len, mp_uint_t free_len);
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#endif
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// Size in bytes of each string entry, followed by a zero (terminator).
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extern const uint32_t mp_frozen_str_sizes[];
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// Null-separated string content.
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extern const char mp_frozen_str_content[];
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#endif // MICROPY_MODULE_FROZEN_STR
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#if MICROPY_MODULE_FROZEN_MPY
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#include "py/emitglue.h"
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extern const mp_frozen_module_t *const mp_frozen_mpy_content[];
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#endif // MICROPY_MODULE_FROZEN_MPY
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// Search for "str" as a frozen entry, returning the stat result
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// (no-exist/file/dir), as well as the type (none/str/mpy) and data.
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// frozen_type can be NULL if its value isn't needed (and then data is assumed to be NULL).
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mp_import_stat_t mp_find_frozen_module(const char *str, int *frozen_type, void **data) {
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size_t len = strlen(str);
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const char *name = mp_frozen_names;
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if (frozen_type != NULL) {
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*frozen_type = MP_FROZEN_NONE;
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}
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// Count the number of str lengths we have to find how many str entries.
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size_t num_str = 0;
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#if MICROPY_MODULE_FROZEN_STR && MICROPY_MODULE_FROZEN_MPY
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for (const uint32_t *s = mp_frozen_str_sizes; *s != 0; ++s) {
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++num_str;
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}
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#endif
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for (size_t i = 0; *name != 0; i++) {
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size_t entry_len = strlen(name);
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if (entry_len >= len && memcmp(str, name, len) == 0) {
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// Query is a prefix of the current entry.
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if (entry_len == len) {
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// Exact match --> file.
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if (frozen_type != NULL) {
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#if MICROPY_MODULE_FROZEN_STR
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if (i < num_str) {
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*frozen_type = MP_FROZEN_STR;
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// Use the size table to figure out where this index starts.
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size_t offset = 0;
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for (size_t j = 0; j < i; ++j) {
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offset += mp_frozen_str_sizes[j] + 1;
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}
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size_t content_len = mp_frozen_str_sizes[i];
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const char *content = &mp_frozen_str_content[offset];
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// Note: str & len have been updated by find_frozen_entry to strip
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// the ".frozen/" prefix (to avoid this being a distinct qstr to
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// the original path QSTR in frozen_content.c).
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qstr source = qstr_from_strn(str, len);
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mp_lexer_t *lex = MICROPY_MODULE_FROZEN_LEXER(source, content, content_len, 0);
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*data = lex;
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}
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#endif
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#if MICROPY_MODULE_FROZEN_MPY
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if (i >= num_str) {
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*frozen_type = MP_FROZEN_MPY;
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// Load the corresponding index as a raw_code, taking
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// into account any string entries to offset by.
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*data = (void *)mp_frozen_mpy_content[i - num_str];
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}
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#endif
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}
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return MP_IMPORT_STAT_FILE;
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} else if (name[len] == '/') {
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// Matches up to directory separator, this is a valid
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// directory path.
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return MP_IMPORT_STAT_DIR;
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}
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}
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// Skip null separator.
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name += entry_len + 1;
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}
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return MP_IMPORT_STAT_NO_EXIST;
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}
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#endif // MICROPY_MODULE_FROZEN
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